mat-card{
    margin: 2.5em auto 0;
    width: 20em;
}
mat-card-title{
    text-align: center;
}
.example-form{
    display: flex;
    flex-direction: column;
}
mat-card-actions{
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
.mat-form-field{
    width: 100%;
    display: block;
}